Rabbit Returns With OS3, an AI Agent That Runs on Your Phone Instead of Its Own Hardware

Rabbit is back, and this time it is not asking anyone to buy another piece of hardware. The company is launching OS3, a cross-platform AI agent that runs on the phones, tablets, and computers people already own, following a two-year stretch in which its original pitch — a dedicated AI gadget that bypassed mobile apps entirely — failed to win over mainstream users.

The original Rabbit R1, unveiled at CES 2024, was a palm-sized orange device built around a single idea: that you could talk to an assistant and skip the app grid altogether. It drew enormous attention at launch, then ran into hard limits. Reviewers found the device slow and narrow, and the company eventually had to address claims that its underlying system was not as novel as advertised. Sales never matched the early hype.

OS3 takes the opposite approach. Instead of shipping a new screen, Rabbit is putting its agent on the screens users already carry, which removes the biggest friction point of the R1 era: convincing someone to add a second device to their pocket. The company has not detailed which platforms OS3 will support first or how it plans to make money from the software, and it has not said whether the R1 will receive the same capabilities.

The shift puts Rabbit in a crowded field. OpenAI, Google, and Anthropic have all pushed their assistants toward agentic behavior — software that can complete multi-step tasks rather than just answer questions — and Apple and Samsung have folded AI features directly into their operating systems. Rabbit's argument is that a standalone cross-platform agent can work across services in ways that a single vendor's assistant cannot or will not.

That argument is plausible but unproven. Cross-platform agents have to negotiate with app makers who control the interfaces and data, and permissions on iOS and Android are tighter than what a dedicated device could offer. Rabbit also carries the reputational weight of the R1, which means OS3 will be judged against a skeptic's memory of the first product rather than a blank slate.

What to watch next is whether Rabbit publishes real benchmarks of OS3 completing tasks end to end, and whether third-party developers sign on to support it. The company's credibility now rests less on a launch demo than on sustained, verifiable performance on devices it does not control.